breathing

• peripheral chemoreceptors found in carotid bodies and aortic bodies
• carotid bodies found on carotid artery
• aortic bodies found on aorta
• Peripheral chemoreceptors stimulated by high partial pressure of co2 and high concentration of hydrogen ions or low pH levels
• nerve impulses are sent from peripheral chemoreceptors to respiratory center in medulla oblongata
• central chemoreceptors are sensitive to partial pressure of carbon dioxide, partial pressure of oxygen and pH levels
• central chemoreceptors are found in medulla oblongata
• as the arterial partial pressure of co2 increases, some co2 molecules diffuse into cerebrospinal fluid
• when central chemoreceptors is stimulated, impulses are sent to the respiratory center
• main stimuli controlling the breathing mechanism are concentration and the partial pressure of co2 and the concentration of hydrogen ions in the blood